Install Java plugin for firefox in RHEL/Oracle Linux

1. Close Firefox
2. Install Java RPM from here : http://www.java.com/en/download/linux_manual.jsp?locale=en
3.  cd /usr/lib64/firefox
4. mkdir plugins
5. cd plugins
6. ll
7. If there is existing link to java plugin delete it
8. ln -s /usr/java/jre1.7.0_06/lib/amd64/libnpjp2.so .
9. Start firefox and go to about:plugins to verify if Java plugin is installed